近年来珠江三角洲作为全国商品粮基地的地位明显下降，主要原因是 [ ] A、城市化

---The weather has been very hot and dry.

---Yes. If it had rained even a drop, things would be much better now! And my vegetables ______.

A．wouldn’t die

B．didn’t die

C．hadn’t died

D．wouldn’t have died

何为紧追权？

竞赛用自行车

质量保证体系的构成包括质量保证的管理机能﹑（）。

卡特尔用因素分析的方法把人格特质区分为表面特质和______。